Solubility of FOX-7 in Binary (Dimethyl Sulfoxide + Cyclopentanone, Methyl Ethyl Ketone, Methyl Isobutyl Ketone) Mixed Solvents with Temperatures Changing from 293.15 to 333.15 K

Abstract

The solubility of 1,1-diamino-2,2-dinitroethylene (FOX-7) was measured using a laser monitoring system in different molar proportions of binary (dimethyl sulfoxide + cyclopentanone, methyl ethyl ketone, methyl isobutyl ketone) mixed solvents with temperatures changing from 293.15 to 333.15 K under 0.1 MPa. The experimental solubility data for FOX-7 were correlated and fitted to thermodynamic models such as van't Hoff equation, Apelblat equation, van't Hoff−Jouyban−Acree model, and Apelblat− Jouyban−Acree model. The results show that the solubility of FOX-7 increases with increasing temperature and the dimethyl sulfoxide ratio. The ranking of FOX-7 solubility in (DMSO + selected ketones) mixed solvents is almost identical with the polarity sequence in the corresponding solvents, indicating that polarity is a critical factor influencing the solubility of FOX-7 in the above mixed solvents. Four models can be used to correlate the solubility data commendably. However, the van't Hoff−Jouyban−Acree model fits the best experimental solubility data.